Date: Dec. 10, 2020
Ductile iron pipe is mainly called centrifugal ductile iron pipe, which has the essence of iron and the performance of steel, excellent anti-corrosion properties, good ductility, good sealing effect, easy to install, and is mainly used for municipal, industrial, and mining enterprises for water supply, gas and oil pipeline, etc. It is the first choice for a water supply pipe, with high-cost performance. It is the first choice for water supply pipes and has a high-cost performance.
How to choose a ductile iron pipe?
1.The choice of ductile iron pipe should be based on the specific conditions of the laying site, the choice of straight pipe, and fittings of the interface form.
2. The rubber ring is usually made of NBR, SBR, EPDM, and so on.
3. The choice of coating: According to the internal and external conditions of use, choose the appropriate coating. The existing internal coating is epoxy resin, polyurethane internal and external coating, PE film coating, and other new products of ductile iron pipe, the selection should be understood in detail when choosing the performance.
Advantages of Ductile Iron Pipe
Ductile iron pipes are safe and reliable in medium and low-pressure pipeline networks (generally under 6MPa), with low breakage rate, easy and fast construction and maintenance, and excellent anti-corrosion performance. The newly developed "Rock Shield" series of pipes can be used in non-excavation construction, and are widely used in the construction of pipelines crossing rivers, roads, and buildings. The "Saison" series pipes use a special zinc-aluminum alloy external coating process, which improves the corrosion resistance of the pipes several times, and is widely used in the construction of corrosive soil.
Anti-corrosion treatment of ductile iron pipes
1. Asphalt paint coating
Asphalt paint coatings are used on pipes that carry gas. Preheating the pipe before painting can improve the adhesion of the asphalt paint and accelerate drying.
2. Cement mortar lining + special coating
This type of internal corrosion protection is suitable for pipelines conveying wastewater and improves the corrosion resistance of the lining.
3. Epoxy coal tar coating
Coal tar epoxy coating is suitable for both gas and sewer lines. It is a two-component coating with high adhesion and a very smooth surface.
4.Epoxy Ceramic Lining
Epoxy ceramic liners are suitable for sewer and gas piping but are limited in use due to the difficulty and high cost of the manufacturing process. Ceramic epoxy liners have high adhesion and finish, making them a good anti-corrosion coating.
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